1 files changed, 43 insertions, 0 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/jface/EmptySelection.java b/common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/jface/EmptySelection.java
new file mode 100644
index 0000000000..089d0f78b1
--- /dev/null
+++ b/common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/jface/EmptySelection.java
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2012 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ * 
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.ui.internal.jface;
+
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jpt.common.utility.internal.StringTools;
+
+/**
+ * Empty implementation of {@link ISelection}.
+ * Implemented as a singleton.
+ */
+public class EmptySelection
+	implements ISelection
+{
+	public static final ISelection INSTANCE = new EmptySelection();
+
+	public static ISelection instance() {
+		return INSTANCE;
+	}
+
+	/**
+	 * Ensure a single instance.
+	 */
+	private EmptySelection() {
+		super();
+	}
+
+	public boolean isEmpty() {
+		return true;
+	}
+
+	@Override
+	public String toString() {
+		return StringTools.buildSingletonToString(this);
+	}
+}